Kenwood KT-1000 User Manual

KENWOOD

KT-IOOO
KT-900
KT-800

Sales

Manual

TUNER

PULSE COUNT DETECTOR

Product

policy

For over three decades, Kenwood
duced innovations
name Kenwood
excellence
will testify that for
whole

lot

more
The average, non-audiophile also wants to
quality

FM and AM

budget

is

usually rather restricted.

Kenwood

has

New

in

tuner design

has thus

in

tuner technology,

to

the answer. At the top of this year's line-up

become universally recognized for

them,

the tuner

tuners than

broadcast scene, even though

Pulse

Detector

Conventional FM detection circuits using an analog method
allow

a lot of
duced
preserve

Kenwood has developed
which uses a digital method
lowing
The wave shapes
and the basic wave shape of each are converted into digital
equivalents in the form
tude.

Since only

chances

to the

is a

original

the

original characteristics

simplified explanation

of

the individual FM signals are sampled

the

basic shape

for

FM

a new

of

noise

signals.

to

pulses

has

continually intro-

and

engineering.

and

many satisfied users

is

Kenwood. But there's a

the

technology, these days.

be

in on the high

For

such customers,

Count

IC

or

distortion

In

of the FM

Pulse Count Detector

detect the FM signals.

of

how

of

equal width and ampli-

of the

order

it

works.

signals

to be

to

faithfully

signals,

are

The

the

is

intro-

IC,

Fol-

con-

the KT-1000 incorporating the latest
packaged without the frills
under in terms
900,

but still offering the superb sound quality expected
Kenwood.
automatic computer-guided tuner that combines excellent
sound quality with unrivalled ease
rundown
points and facts

verted into digital equivalents,
ples caused by noise or distortion are simply ignored — the

result

is a
free from distortion
changes
back into
same as originally input. Any noise
have affected
been completely eliminated. This system
KT-1000 and KT-900.

of

features and price range comes the KT-

Finally, there's

of

these three great

to

digital equivalent

in

temperature,

an

analog

the

signal during the detection process

to

the

help you sell

of

or

noise and remarkably stable against

humidity

signal,

the

in

tuner

technology,

attract a wider market.

totally new-style KT-800,

of

operation. Here's

new

tuners,

and the

them.

any

minor deviations

the pure original

and

age.

When converted

signal

at output

or

distortion that might

is

FM

is

exactly the

utilized

or
signal,

in the

but

A bit

of

an

a

sales

rip-

has

Direct

When there
sources competing for air
too easily picked
introducing a great
such interference, Kenwood
Conversion technique. This by-passes
stage,

are

sending signals instead directly

RF

many powerful

space,

up by the FM

deal

of

noise

has

Conversion

FM

extraneous signals are all

antenna

and

distortion.

developed a Direct

stations

and

the RF

to the

and

other

amplified,

To

eliminate

RF

amplifier

mixer stage,

where

the

intermodulation products produced
interference
than amplified. Either Direct RF Conversion
version can be selected by a
the method most suitable to the particular reception condi-
tions.

of

extraneous signals

This system

are

switch,

allowing the choice of

is

utilized in the KT-1000.

attenuated rather

or

by the

normal

con-

Independent

Power

Supply

For

One consequence
power supplies
power supply unit
modulate

inaccuracies

below

High

In

the
tended
quality
able

Local

is

the

local oscillator frequency. This causes tuning

by

deflecting

its

optimum

past,

AM

sections

to be

neglected because

of AM

broadcasts.

to

reproduce

Oscillator

of the

that leakage from

can

level.

relatively high impedance

the +B

feed back

Kenwood engineers solved this

to the

local oscillator

the

tuned frequency above

Quality

of

FM/AM stereo tuners have

of the

generally inferior

Now,

Kenwood tuners

the

upgraded

AM

broadcast quality, with

line

of

of the

to

and

problem
the oscillator, giving the local oscillator its own independent
power supply. With
age

is

the KT-1000, this

AM Section

AM sections that are as carefully designed as FM sections.
In

the

are

fully

section.

Sample-And-Hold
MPX Circuit

by

eliminating

virtually non-existent, even

KT-1000

the

two

power supplies, noise

is

perfectly utilized.

an

IF

band selector

source itself — the + B line

at

is

100%

provided

due

to

leak-

modulation.

for

the

to

In

AM

As

with the Pulse Count Detector, Kenwood engineers have
taken advantage
cessing with
plex decoder. This circuit cleanly extracts the left and right
channel signals from
the

38

kHz subcarrier frequency. The wave peaks are
verted into digital equivalents
only the basic shape
equivalents, transient deflections

Quartz

Preset

Kenwood's quartz-PLL tuning circuit uses
oscillating frequency
quency generated by the local oscillator

tuning frequency.
automatically tune
many

as

of

the exceptional accuracy

the

introduction

of

of a

The

to any one of any

eight different

of

digital pro-

of

the Sample-and-Hold

the

composite

the waves are converted into digital

in the

in the

FM

signal carried

form

of

shape

pulses. Since

of

multi-

by

con-

waves

Synthesizer

Tuning

the

ultra-stable

quartz crystal

quartz-PLL circuit

FM or

AM

to

locked

can

combination

stations.

keep

the

to the exact

be

preset

To

preset,

fre-

to

of as

the

caused

by

noise

or

distortion

reduces

the

need

for

filtering,
nel separation, because filtering
information
ty

to
are sampled then held in a capacitor until the next peak
rives;
for precise representation
The KT-1000 employs this superior type

desired station
button
buttons
pressing
automatically tune the
the KT-800.

in

the composite

isolate left and right channel signals.

thus,

the average peak value

is

manually tuned

is

pressed, after which

may be

pressed. Whenever that station

the

station button previously selected will

station.

are

ignored. This greatly

which vastly improves chan-

can

obscure important

signal,

interfering with the

The

peak pulses

can be

instantly adjusted

of

the original 38 kHz subcarrier.

of

MPX

decoder.

in, and

any one of

This system is fully utilized

then

the

eight station

is

desired,

preset

abili-

ar-

in

Sales Points

Key Specs

KT-1000

• Pulse Count

• Direct RF Conversion with Selector

• Dual-gate MOS-FET front-end with 5-gang tuning
capacitor

• Sample-and-Hold multiplex decoder

• Independent local oscillator power supply

• Servo-lock tuning

• High quality design AM section

• Narrow and Wide
and

AM

FM

Detector

IF

band selection

for

both

FM

KT-900

• Pulse Count

• Dual-gate MOS-FET front-end with 4-gang tuning
capacitor

• Servo-lock tuning

• High quality design AM section

• Dual-color signal strength
indicators

• Digital frequency display

• Clean reception filter

• Narrow and Wide

FM

Detector

IF

band selection

and

fine-tuning

for FM

LED

FM usable sensitivity: 23.3 dBf (8.0>V)
RF Conversion mode 10.3 dBf (1.8/A/)
mode

FM THD
Alternate channel selectivity: 65 dB
(NARROW) 45 dB (WIDE)

Stereo separation
(NARROW)
Signal-to-noise ratio: 90 dB (mono), 85 dB (stereo)

Frequency response: 15 Hz

FM usable sensitivity: 10.8 dBf (1.9^V)

FM THD
Alternate channel selectivity: 65 dB
(NARROW) 45 dB (WIDE)
Stereo separation
(NARROW)
Signal-to-noise ratio: 88 dB (mono), 83 dB (stereo)
Frequency response: 30

-0.8 dB

at 1 kHz: 0.03% (mono), 0.04% (stereo)

at

1 kHz: 60 dB (WIDE), 50 dB

to

15 kHz

at 1 kHz: 0.03% (mono), 0.04% (stereo)

at

1 kHz: 55 dB (WIDE), 47

Hz to

15 kHz +0.2 dB,

in

in

at

300 kHz

±0.5

at

300 kHz

Direct

normal

dB

dB

KT-800

New, clean panel with store-away control pocket
Quartz synthesizer tuning
8-station FM/AM preset memory bank with
nated indicator panels
Preset automatic selection

stations

FM/AM preset station random access
2-ganged AM tuning capacitor for high AM recep-
tion quality
Operational convenience and flexibility
Switchable digital display
needed
New signal strength and fine-tune display
Automatic stereo muting

of up to 8 FM or AM

of

frequency

or

illumi-

time

as

•

FM

usable sensitivity: 10.8 dBf (1.9/iV)

• FM THD

• Alternate channel selectivity: 60

• Stereo separation

• Signal-to-noise ratio: 74 dB (mono), 71 dB (stereo)

• Frequency response: 30

-2dB

at 1 kHz: 0.07% (mono), 0.09% (stereo)

dB

at

1 kHz: 50

dB

Hz to

15 kHz +0.2 dB,

Operating Features

O Power switch
©FM

REC CAL switch.

oscillator helps achieve accurate rec-
ord level settings

©FM/AM

and Narrow band settings. Wide-band
indicator.

©

POWER

©LED

IF band, servo-lock, AM,

©AUTO/MUT

tor.

tains acceptable minimum noise level
for weak stations.

IF BAND selector.

switch

mode indicators.

Auto-muting automatically

on

and MONO mode selec-

Built-in tone

tape deck.

With Wide

Stereo, Narrow

FM.

main-

O LOCK/AUTO BLEND/MUTING switch.

Activates servo-lock system simultane-
ously with automatic muting for weak
tions

to

maintain minimum acceptable

noise

level.

©FM RF selector.

conversion,

©

IF

BAND WIDE and NARROW selector

© LOCK switch.

lock tuning and normal fine-tuning.

©REC

establishes reference

recording levels.

© FM/AM selector

Indicator

with indicator

CAL selector.

for

"Muting

Direct

or

Normal

for

Selects between servo-

Oscillator tone

for

correct tape

sta-

On"

RF

Normal

setting.

© FM/AM selector

©

Signal

©Tuning
© STEREO indicator
©SERVO-LOCK

© Digital frequency display.
©Tuning

©Signal-strength
©Touch-sensor

strength meter

meter

tuned status after hand is released from

tuning knob.

© Touch-sensor tuning knob.

May

tuning.

cates off-tuned status, green indicates
precise tuning point.

tive strength

May

tuning.

indicator.

be

deactivated

direction indicator. Red

display.

of

tuned signal.

tuning knob.

be

deactivated

Shows lock

for

normal

Shows rela-

for

normal

indi-

©TUNER

tween tuner operation
only. Power
digital clock.

© DISPLAY switch.

play of frequency

OFF/ON switch.

is

supplied constantly

o © ©

©

Selects

or

digital clock

Selects between

being

tuned

in and

©©©

©CLOCK

be

to

dis-

time.

gether with nearby Hours
buttons

©TUNING

up

buttons double

© MUTING selector with LED indicator.

ADJUST button.

to set

correct time.

buttons.

or

down

the

To

tune automatically

frequency bands. These

as

clock-adjustors.

Used

and

to-

Minutes

To activate automatic muting mode
maintain acceptable minimum noise
threshold at

© FM/AM selector
©PRESET

switch

all

times in both FM

control button.

to

activate preset station

ory

for

storage.

©

Digital frequency/time

display.

©

New vertical signal strength
display

©

8-station bank allows instant
dom access

are used with Preset control
button

With FM

TUNED,STEREO indicators.

Preset station keys.

to

preset FM

for

memory storage.

and

Preliminary

mem-

or

AM displays

and

to

AM.

ran-

AM

Specifications

FM

TUNER SECTION

Usable Sensitivity
50dB Quieting Sensitivity

(Mono)
(Stereo)

Signal

to

Noise Ratio
(Mono) 90dB
(Stereo)

Total Harmonic Distortion

Mono 100Hz

1 000Hz 0 03%
6 000Hz 0 05% 0 3 %

15 000Hz 0 04%

50 — 10 000Hz

Stereo 100Hz 0 04%

1 000Hz 0
6,000Hz 0 06% 0.3

15 000Hz 0 4 %

50 —10 000Hz 0 12% 0.6
Capture Ratio 0 8dB
Alternate Channel Selectivity 45dB
Stereo Separation

Frequency Response

Spurious Response Ratio 120dB

Image Response Ratio 90dB

IF Response Ratio
AM Suppression Ratio 70dB
Subcarrier Product Ratio
Antenna Impedance

FM Frequency Range
Output Level Fixed

1 000Hz 60dB

50 — 10 000Hz

15 000Hz

1,000Hz

100% Modulation Variable

KT-1000

NORMAL DIRECT

10 3dBf(1
16 4dBf(3 6^V) 29 3dBf(16/jV)

37 3riRf

85dB

WIDE

0 03%

0 08%

04%

47dB

40rlR
15H7to15.0n0H7+0.5riB

110dB
73riR

75 ohms unbalanced

88MHzto 108MHz
0 75V 2 2k ohms
Oto 1.5V, 2.2kohms

8MV)

(4U,JV1

NARROW

0.04%

0 15%

0.07%

0.3%
0 3
0 3 %

1.0

2
65dB (300kHz)

50dB
35dB

23 3dBf(8 0^V)

49

firiRf

dfifiuW . 37.3dBf (40f/V) 38.4dBf (46MV)

%
%

%
%

OdB

KT-900

.

10.8dB*(1.9pV)

.

16.4dBf

(3.6JJV)

.

88dB

.

83dB

WIDE

NARROW

.

0.03%

0.04%

.

0.03%

0.15%

.

0.05%

0.4 %

0.05%

0.07%

.

0.09%

0.4 %

.

0.05%

0.3 %

.

0.04%

0.3 %

.

0.07%

0.3 %

0.5

% 1.0 %

.

0.18%

0.6 %

.

1.0dB 2.0a B

.

45dB 65dB (300kHz) 60dB

.

55dB • 47dB 50dB

.

45dB 35dB

.

37dB

30Hz to 15,000Hz + 0.2dB, -0.8dB

.

120dB

.

90dB

.

100dB 90dB

.

70dB

68dB

.

300 ohms balanced 300 ohms balanced

& 75 ohms unbalanced

.

88MHzt0

.

0.75V, 1.8k ohms 0.75V, 5.6k ohms

108MHz

KT-800

10.8dBf (1.9f/V)

16.4dBf (3.6fjV)

74dB
71dB

0.07%

0.07%

0.11

%

0.12%

0.15%

0.09%

0.14%

0.4

%

1.5dB

40dB
36dB

.. . 30Hz

to

15,000Hz + 0.2dB,
110dB
80dB

60dB

& 75 ohms unbalanced
88MHz

to

108MHz

-2dB

AM

TUNER SECTION

Usable Sensitivity
Signal to Noise Ratio

Total Harmonic Distortion 0 2%
Image Rejection
Selectivity
Output Level Fixed

400Hz30% Modulation Variable

GENERAL

Power Requirements

Power Consumption
Dimensions (W* Hx D)

Weight (Net)

Kenwood follows a policy

•

Please

direct all technical inquiries to:

TRIO-KENWOOD CORPORATION

Shionogi ShiDuya Building. 17-5. 2-chome Shibuya. Shibuya-ku. Tokyo

of

continuous advancements

A

product

10HV

.. .

52dB

.

7f)riR
30dB (WIDE), 50dB (NARROW) . 58dB

0.25V, 2.2k ohms
Oto0.5V, 2.2k ohms

fif1H7

1?0V

(U S A & Canada Model)
or 50/60Hz 110 — 120/220 — 240V..
switrhahlp
0 1HA
440*

123x388mm

(17-5/16" x 4-27/32" x 15-9/32")

6.5kg

(14.3lbs)

in

development. For this reason specifications may be changed without notice.

of

150.

Japan

.

<3.,V 18MV

.

52dB

0.4%

.

45dB

.

0.15V, 2k ohms

.

60Hz120V 60Hz 120V

.

(U.S.A. & Canada Model)

.

or50/60HZ110 — 120/220 —240V..

.

switchable

.

0.25A

.

440x78x 390mm

.

(17-5/16"X3-1/16"X15-11/32")

.

5.1kg (11.2lbs) 2.2kg (4.8lbs)

KENWOOD

ELECTRONICS, INC.

1315 E Watsoncentet Rd,
75

Seaview

Drive,

1098

North Tower

TRIO-KENWOOD
TRIO-KENWOOD
TRIO-KENWOOD

Rudolf-Braas-SIr

TRIO-KENWOOD
TRIO-KENWOOD
TRIO-KENWOOD
TRIO-KENWOOD
KENWOOD & LEE ELECTRONICS, LTD.

Wang

Kee

Building.

Carson.

Secaucus, New Jersey

Lane,

CANADA INC., 1070Javson Court Mississauga,Ontario Canada L4W

ELECTRONICS, N.V. Leuvensesteenweg 504 B-1930 Zaventem, Belgium
ELECTRONICS GmbH

20. 6056 Heusenstamm, Wes! Germany

FRANCE S.A.
SVENSKA AB. Kemistvagen
AG
(AUSTRALIA) PTY. LTD.

5th Floor,

California 90745.

5,

Boulevard Ney, 75018

34-37,

Connaught

07094.
60106,

30

10A PO

Whinng

Road,

Bensenville. Illinois

Unlerboesch 6331 Huenenberg/ZUG Switzerland

.

USA

Pans,

Box 68, S-183 21 Taby. Sweden

St ,

Artarmdn,

Central.

50dB
40dB

50dB

0.25V, 5.6k ohms

(U.S.A. & Canada Model)

or

50/60Hz 110 — 120/220

switchable

0.1A
440x52x247mm
(17-5/16"x

Hong Kong

France

NSW

2-1 /32" x 9-23/32

2V5

2064,

Australia

)

—

240V

MF479 8101007SA Printed

in

Japan